1 %{ 2 /* 3 * Copyright (c) 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997 4 * The Regents of the University of California. All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that: (1) source code distributions 8 * retain the above copyright notice and this paragraph in its entirety, (2) 9 * distributions including binary code include the above copyright notice and 10 * this paragraph in its entirety in the documentation or other materials 11 * provided with the distribution, and (3) all advertising materials mentioning 12 * features or use of this software display the following acknowledgement: 13 * ``This product includes software developed by the University of California, 14 * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of 15 * the University nor the names of its contributors may be used to endorse 16 * or promote products derived from this software without specific prior 17 * written permission. 18 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED 19 * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF 20 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. 21 * 22 * $FreeBSD$ 23 */ 24 25 #ifndef lint 26 static const char rcsid[] _U_ = 27 "@(#) $Header: /tcpdump/master/libpcap/scanner.l,v 1.112 2008-02-06 10:21:30 guy Exp $ (LBL)"; 28 #endif 29 30 #ifdef HAVE_CONFIG_H 31 #include "config.h" 32 #endif 33 34 #ifdef WIN32 35 #include <pcap-stdinc.h> 36 #else /* WIN32 */ 37 #if HAVE_INTTYPES_H 38 #include <inttypes.h> 39 #elif HAVE_STDINT_H 40 #include <stdint.h> 41 #endif 42 #ifdef HAVE_SYS_BITYPES_H 43 #include <sys/bitypes.h> 44 #endif 45 #include <sys/types.h> 46 #endif /* WIN32 */ 47 48 #include <ctype.h> 49 #include <string.h> 50 51 #include "pcap-int.h" 52 53 #include "gencode.h" 54 #ifdef INET6 55 #ifdef WIN32 56 #include <pcap-stdinc.h> 57 58 #ifdef __MINGW32__ 59 #include "ip6_misc.h" 60 #endif 61 #else /* WIN32 */ 62 #include <sys/socket.h> /* for "struct sockaddr" in "struct addrinfo" */ 63 #include <netdb.h> /* for "struct addrinfo" */ 64 #endif /* WIN32 */ 65 66 /* Workaround for AIX 4.3 */ 67 #if !defined(AI_NUMERICHOST) 68 #define AI_NUMERICHOST 0x04 69 #endif 70 #endif /*INET6*/ 71 #include <pcap/namedb.h> 72 #include "tokdefs.h" 73 74 #ifdef HAVE_OS_PROTO_H 75 #include "os-proto.h" 76 #endif 77 78 static int stoi(char *); 79 static inline int xdtoi(int); 80 81 #ifdef FLEX_SCANNER 82 #define YY_NO_INPUT 83 #define YY_NO_UNPUT 84 static YY_BUFFER_STATE in_buffer; 85 #else 86 static const char *in_buffer; 87 88 #undef getc 89 #define getc(fp) (*in_buffer == 0 ? EOF : *in_buffer++) 90 #endif 91 92 extern YYSTYPE yylval; 93 94 %} 95 96 N ([0-9]+|(0X|0x)[0-9A-Fa-f]+) 97 B ([0-9A-Fa-f][0-9A-Fa-f]?) 98 B2 ([0-9A-Fa-f][0-9A-Fa-f][0-9A-Fa-f][0-9A-Fa-f]) 99 W ([0-9A-Fa-f][0-9A-Fa-f]?[0-9A-Fa-f]?[0-9A-Fa-f]?) 100 101 %a 18400 102 %o 21500 103 %e 7600 104 %k 4550 105 %p 27600 106 %n 2000 107 108 V680 {W}:{W}:{W}:{W}:{W}:{W}:{W}:{W} 109 110 V670 ::{W}:{W}:{W}:{W}:{W}:{W}:{W} 111 V671 {W}::{W}:{W}:{W}:{W}:{W}:{W} 112 V672 {W}:{W}::{W}:{W}:{W}:{W}:{W} 113 V673 {W}:{W}:{W}::{W}:{W}:{W}:{W} 114 V674 {W}:{W}:{W}:{W}::{W}:{W}:{W} 115 V675 {W}:{W}:{W}:{W}:{W}::{W}:{W} 116 V676 {W}:{W}:{W}:{W}:{W}:{W}::{W} 117 V677 {W}:{W}:{W}:{W}:{W}:{W}:{W}:: 118 119 V660 ::{W}:{W}:{W}:{W}:{W}:{W} 120 V661 {W}::{W}:{W}:{W}:{W}:{W} 121 V662 {W}:{W}::{W}:{W}:{W}:{W} 122 V663 {W}:{W}:{W}::{W}:{W}:{W} 123 V664 {W}:{W}:{W}:{W}::{W}:{W} 124 V665 {W}:{W}:{W}:{W}:{W}::{W} 125 V666 {W}:{W}:{W}:{W}:{W}:{W}:: 126 127 V650 ::{W}:{W}:{W}:{W}:{W} 128 V651 {W}::{W}:{W}:{W}:{W} 129 V652 {W}:{W}::{W}:{W}:{W} 130 V653 {W}:{W}:{W}::{W}:{W} 131 V654 {W}:{W}:{W}:{W}::{W} 132 V655 {W}:{W}:{W}:{W}:{W}:: 133 134 V640 ::{W}:{W}:{W}:{W} 135 V641 {W}::{W}:{W}:{W} 136 V642 {W}:{W}::{W}:{W} 137 V643 {W}:{W}:{W}::{W} 138 V644 {W}:{W}:{W}:{W}:: 139 140 V630 ::{W}:{W}:{W} 141 V631 {W}::{W}:{W} 142 V632 {W}:{W}::{W} 143 V633 {W}:{W}:{W}:: 144 145 V620 ::{W}:{W} 146 V621 {W}::{W} 147 V622 {W}:{W}:: 148 149 V610 ::{W} 150 V611 {W}:: 151 152 V600 :: 153 154 V6604 {W}:{W}:{W}:{W}:{W}:{W}:{N}\.{N}\.{N}\.{N} 155 156 V6504 ::{W}:{W}:{W}:{W}:{W}:{N}\.{N}\.{N}\.{N} 157 V6514 {W}::{W}:{W}:{W}:{W}:{N}\.{N}\.{N}\.{N} 158 V6524 {W}:{W}::{W}:{W}:{W}:{N}\.{N}\.{N}\.{N} 159 V6534 {W}:{W}:{W}::{W}:{W}:{N}\.{N}\.{N}\.{N} 160 V6544 {W}:{W}:{W}:{W}::{W}:{N}\.{N}\.{N}\.{N} 161 V6554 {W}:{W}:{W}:{W}:{W}::{N}\.{N}\.{N}\.{N} 162 163 V6404 ::{W}:{W}:{W}:{W}:{N}\.{N}\.{N}\.{N} 164 V6414 {W}::{W}:{W}:{W}:{N}\.{N}\.{N}\.{N} 165 V6424 {W}:{W}::{W}:{W}:{N}\.{N}\.{N}\.{N} 166 V6434 {W}:{W}:{W}::{W}:{N}\.{N}\.{N}\.{N} 167 V6444 {W}:{W}:{W}:{W}::{N}\.{N}\.{N}\.{N} 168 169 V6304 ::{W}:{W}:{W}:{N}\.{N}\.{N}\.{N} 170 V6314 {W}::{W}:{W}:{N}\.{N}\.{N}\.{N} 171 V6324 {W}:{W}::{W}:{N}\.{N}\.{N}\.{N} 172 V6334 {W}:{W}:{W}::{N}\.{N}\.{N}\.{N} 173 174 V6204 ::{W}:{W}:{N}\.{N}\.{N}\.{N} 175 V6214 {W}::{W}:{N}\.{N}\.{N}\.{N} 176 V6224 {W}:{W}::{N}\.{N}\.{N}\.{N} 177 178 V6104 ::{W}:{N}\.{N}\.{N}\.{N} 179 V6114 {W}::{N}\.{N}\.{N}\.{N} 180 181 V6004 ::{N}\.{N}\.{N}\.{N} 182 183 184 V6 ({V680}|{V670}|{V671}|{V672}|{V673}|{V674}|{V675}|{V676}|{V677}|{V660}|{V661}|{V662}|{V663}|{V664}|{V665}|{V666}|{V650}|{V651}|{V652}|{V653}|{V654}|{V655}|{V640}|{V641}|{V642}|{V643}|{V644}|{V630}|{V631}|{V632}|{V633}|{V620}|{V621}|{V622}|{V610}|{V611}|{V600}|{V6604}|{V6504}|{V6514}|{V6524}|{V6534}|{V6544}|{V6554}|{V6404}|{V6414}|{V6424}|{V6434}|{V6444}|{V6304}|{V6314}|{V6324}|{V6334}|{V6204}|{V6214}|{V6224}|{V6104}|{V6114}|{V6004}) 185 186 MAC ({B}:{B}:{B}:{B}:{B}:{B}|{B}\-{B}\-{B}\-{B}\-{B}\-{B}|{B}\.{B}\.{B}\.{B}\.{B}\.{B}|{B2}\.{B2}\.{B2}|{B2}{3}) 187 188 189 190 %% 191 dst return DST; 192 src return SRC; 193 194 link|ether|ppp|slip return LINK; 195 fddi|tr|wlan return LINK; 196 arp return ARP; 197 rarp return RARP; 198 ip return IP; 199 sctp return SCTP; 200 tcp return TCP; 201 udp return UDP; 202 icmp return ICMP; 203 igmp return IGMP; 204 igrp return IGRP; 205 pim return PIM; 206 vrrp return VRRP; 207 carp return CARP; 208 radio return RADIO; 209 210 ip6 return IPV6; 211 icmp6 return ICMPV6; 212 ah return AH; 213 esp return ESP; 214 215 atalk return ATALK; 216 aarp return AARP; 217 decnet return DECNET; 218 lat return LAT; 219 sca return SCA; 220 moprc return MOPRC; 221 mopdl return MOPDL; 222 223 iso return ISO; 224 esis return ESIS; 225 es-is return ESIS; 226 isis return ISIS; 227 is-is return ISIS; 228 l1 return L1; 229 l2 return L2; 230 iih return IIH; 231 lsp return LSP; 232 snp return SNP; 233 csnp return CSNP; 234 psnp return PSNP; 235 236 clnp return CLNP; 237 238 stp return STP; 239 240 ipx return IPX; 241 242 netbeui return NETBEUI; 243 244 host return HOST; 245 net return NET; 246 mask return NETMASK; 247 port return PORT; 248 portrange return PORTRANGE; 249 proto return PROTO; 250 protochain { 251 #ifdef NO_PROTOCHAIN 252 bpf_error("%s not supported", yytext); 253 #else 254 return PROTOCHAIN; 255 #endif 256 } 257 258 gateway return GATEWAY; 259 260 type return TYPE; 261 subtype return SUBTYPE; 262 direction|dir return DIR; 263 address1|addr1 return ADDR1; 264 address2|addr2 return ADDR2; 265 address3|addr3 return ADDR3; 266 address4|addr4 return ADDR4; 267 ra return RA; 268 ta return TA; 269 270 less return LESS; 271 greater return GREATER; 272 byte return CBYTE; 273 broadcast return TK_BROADCAST; 274 multicast return TK_MULTICAST; 275 276 and|"&&" return AND; 277 or|"||" return OR; 278 not return '!'; 279 280 len|length return LEN; 281 inbound return INBOUND; 282 outbound return OUTBOUND; 283 284 vlan return VLAN; 285 mpls return MPLS; 286 pppoed return PPPOED; 287 pppoes return PPPOES; 288 289 lane return LANE; 290 llc return LLC; 291 metac return METAC; 292 bcc return BCC; 293 oam return OAM; 294 oamf4 return OAMF4; 295 oamf4ec return OAMF4EC; 296 oamf4sc return OAMF4SC; 297 sc return SC; 298 ilmic return ILMIC; 299 vpi return VPI; 300 vci return VCI; 301 connectmsg return CONNECTMSG; 302 metaconnect return METACONNECT; 303 304 on|ifname return PF_IFNAME; 305 rset|ruleset return PF_RSET; 306 rnr|rulenum return PF_RNR; 307 srnr|subrulenum return PF_SRNR; 308 reason return PF_REASON; 309 action return PF_ACTION; 310 311 fisu return FISU; 312 lssu return LSSU; 313 lsu return LSSU; 314 msu return MSU; 315 sio return SIO; 316 opc return OPC; 317 dpc return DPC; 318 sls return SLS; 319 320 [ \r\n\t] ; 321 [+\-*/:\[\]!<>()&|=] return yytext[0]; 322 ">=" return GEQ; 323 "<=" return LEQ; 324 "!=" return NEQ; 325 "==" return '='; 326 "<<" return LSH; 327 ">>" return RSH; 328 ${B} { yylval.e = pcap_ether_aton(((char *)yytext)+1); 329 return AID; } 330 {MAC} { yylval.e = pcap_ether_aton((char *)yytext); 331 return EID; } 332 {N} { yylval.i = stoi((char *)yytext); return NUM; } 333 ({N}\.{N})|({N}\.{N}\.{N})|({N}\.{N}\.{N}\.{N}) { 334 yylval.s = sdup((char *)yytext); return HID; } 335 {V6} { 336 #ifdef INET6 337 struct addrinfo hints, *res; 338 memset(&hints, 0, sizeof(hints)); 339 hints.ai_family = AF_INET6; 340 hints.ai_flags = AI_NUMERICHOST; 341 if (getaddrinfo(yytext, NULL, &hints, &res)) 342 bpf_error("bogus IPv6 address %s", yytext); 343 else { 344 freeaddrinfo(res); 345 yylval.s = sdup((char *)yytext); return HID6; 346 } 347 #else 348 bpf_error("IPv6 address %s not supported", yytext); 349 #endif /*INET6*/ 350 } 351 {B}:+({B}:+)+ { bpf_error("bogus ethernet address %s", yytext); } 352 icmptype { yylval.i = 0; return NUM; } 353 icmpcode { yylval.i = 1; return NUM; } 354 icmp-echoreply { yylval.i = 0; return NUM; } 355 icmp-unreach { yylval.i = 3; return NUM; } 356 icmp-sourcequench { yylval.i = 4; return NUM; } 357 icmp-redirect { yylval.i = 5; return NUM; } 358 icmp-echo { yylval.i = 8; return NUM; } 359 icmp-routeradvert { yylval.i = 9; return NUM; } 360 icmp-routersolicit { yylval.i = 10; return NUM; } 361 icmp-timxceed { yylval.i = 11; return NUM; } 362 icmp-paramprob { yylval.i = 12; return NUM; } 363 icmp-tstamp { yylval.i = 13; return NUM; } 364 icmp-tstampreply { yylval.i = 14; return NUM; } 365 icmp-ireq { yylval.i = 15; return NUM; } 366 icmp-ireqreply { yylval.i = 16; return NUM; } 367 icmp-maskreq { yylval.i = 17; return NUM; } 368 icmp-maskreply { yylval.i = 18; return NUM; } 369 tcpflags { yylval.i = 13; return NUM; } 370 tcp-fin { yylval.i = 0x01; return NUM; } 371 tcp-syn { yylval.i = 0x02; return NUM; } 372 tcp-rst { yylval.i = 0x04; return NUM; } 373 tcp-push { yylval.i = 0x08; return NUM; } 374 tcp-ack { yylval.i = 0x10; return NUM; } 375 tcp-urg { yylval.i = 0x20; return NUM; } 376 tcp-ece { yylval.i = 0x40; return NUM; } 377 tcp-cwr { yylval.i = 0x80; return NUM; } 378 [A-Za-z0-9]([-_.A-Za-z0-9]*[.A-Za-z0-9])? { 379 yylval.s = sdup((char *)yytext); return ID; } 380 "\\"[^ !()\n\t]+ { yylval.s = sdup((char *)yytext + 1); return ID; } 381 [^ \[\]\t\n\-_.A-Za-z0-9!<>()&|=]+ { 382 bpf_error("illegal token: %s", yytext); } 383 . { bpf_error("illegal char '%c'", *yytext); } 384 %% 385 void 386 lex_init(buf) 387 const char *buf; 388 { 389 #ifdef FLEX_SCANNER 390 in_buffer = yy_scan_string(buf); 391 #else 392 in_buffer = buf; 393 #endif 394 } 395 396 /* 397 * Do any cleanup necessary after parsing. 398 */ 399 void 400 lex_cleanup() 401 { 402 #ifdef FLEX_SCANNER 403 if (in_buffer != NULL) 404 yy_delete_buffer(in_buffer); 405 in_buffer = NULL; 406 #endif 407 } 408 409 /* 410 * Also define a yywrap. Note that if we're using flex, it will 411 * define a macro to map this identifier to pcap_wrap. 412 */ 413 int 414 yywrap() 415 { 416 return 1; 417 } 418 419 /* Hex digit to integer. */ 420 static inline int 421 xdtoi(c) 422 register int c; 423 { 424 if (isdigit(c)) 425 return c - '0'; 426 else if (islower(c)) 427 return c - 'a' + 10; 428 else 429 return c - 'A' + 10; 430 } 431 432 /* 433 * Convert string to integer. Just like atoi(), but checks for 434 * preceding 0x or 0 and uses hex or octal instead of decimal. 435 */ 436 static int 437 stoi(s) 438 char *s; 439 { 440 int base = 10; 441 int n = 0; 442 443 if (*s == '0') { 444 if (s[1] == 'x' || s[1] == 'X') { 445 s += 2; 446 base = 16; 447 } 448 else { 449 base = 8; 450 s += 1; 451 } 452 } 453 while (*s) 454 n = n * base + xdtoi(*s++); 455 456 return n; 457 } 458